Lot 131, an important coloured diamond and diamond ring in platinum and rose gold by Harry Winston, set with a rectangular-cut fancy intense pink diamond weighing approximately 6.10ct, from the private collection of animal rights campaigner Riki Shaw (est

Lot 131, an important coloured diamond and diamond ring in platinum and rose gold by Harry Winston, set with a rectangular-cut fancy intense pink diamond weighing approximately 6.10ct, from the private collection of animal rights campaigner Riki Shaw (estimate: US$4-6 million).